Bella Allessandra,

The best resource for searching in VC is to rent films, if you can, otherwise you can write for a situazione di famiglia originaria from the resigtri dello stato civile.

There is one Family Hisoty Center in Milan where you can do your research and rent films for Valguarnera. They will help you with all that you need:

Milano Italy
Via Padre Carlo Salerio, 57
Milano, Lombardia, Italy
Phone: 39-02-284-7416
Hours: M 16:00-19:00; T, Th 9:00-12:00; W 15:45-21:00

I hope this helps!
Ciao